Method for reporting channel state information on basis of priorities in wireless communication system and device therefor

Abstract

The present specification provides a method for reporting channel state information (CSI) on the basis of priorities in a wireless communication system. More specifically, the method performed by a terminal comprises: a step of receiving, from a base station, downlink control information (DCI) including a reporting trigger for a plurality of CSIs of the same type; and a step of reporting a specific CSI determined on the basis of a predetermined rule among the plurality of CSIs if a time resource and a frequency resource for reporting among the plurality of CSIs are the same, wherein the specific CSI is a CSI that has priority among the plurality of CSIs on the basis of the predetermined rule.

The invention claimed is: 
     
       1. A method of reporting channel state information (CSI) based on a priority in a wireless communication system, the method performed by a terminal comprising:
 receiving, from a base station, downlink control information (DCI) including a reporting trigger for some of a plurality of pieces of CSI using periodic reporting, 
 wherein the some of the plurality of pieces of CSI is semi-persistent CSI (SP-CSI) and remaining of the plurality of pieces of CSI other than the some of the plurality of pieces of CSI is periodic-CSI (P-CSI); and 
 reporting specific CSI determined based on a predetermined rule among the plurality of pieces of CSI when at least any one of time resources and frequency resources for reporting between the plurality of pieces of CSI is identical, 
 wherein the specific CSI is CSI prioritized based on the predetermined rule among the plurality of pieces of CSI, and 
 wherein the predetermined rule includes prioritizing the SP-CSI over the P-CSI when the plurality of pieces of CSI for which at least any one of the time resource or the frequency resource is identical and has a period difference within a threshold or preset range. 
 
     
     
       2. The method of  claim 1 ,
 wherein the predetermined rule further includes prioritizing CSI having a long period among the plurality of pieces of CSI for which at least any one of the time resource or the frequency resource is identical. 
 
     
     
       3. The method of  claim 1 ,
 wherein the predetermined rule further includes prioritizing CSI having a long period among the plurality of pieces of CSI for which at least any one of the time resource or the frequency resource is identical. 
 
     
     
       4. The method of  claim 1 ,
 wherein the predetermined rule is transmitted through higher layer signaling. 
 
     
     
       5. A terminal performing a method of reporting channel state information (CSI) based on a priority in a wireless communication system, the terminal comprising:
 a transmitter; 
 a receiver; and 
 a processor functionally connected to the transmitter and the receiver, 
 wherein the processor is configured to: 
 control the receiver to receive, from a base station, downlink control information (DCI) including a reporting trigger for some of a plurality of pieces of CSI using periodic reporting, 
 wherein the some of the plurality of pieces of CSI is semi-persistent CSI (SP-CSI) and remaining of the plurality of pieces of CSI other than the some of the plurality of pieces of CSI is periodic-CSI (P-CSI); and 
 control the transmitter to report specific CSI determined based on a predetermined rule among the plurality of pieces of CSI when at least any one of time resources and frequency resources for reporting between the plurality of pieces of CSI is identical, 
 wherein the specific CSI is CSI prioritized based on the predetermined rule among the plurality of pieces of CSI, and 
 wherein the predetermined rule includes prioritizing the SP-CSI over the P-CSI when the plurality of pieces of CSI for which at least any one of the time resource or the frequency resource is identical and has a period difference within a threshold or preset range. 
 
     
     
       6. The terminal of  claim 5 ,
 wherein the predetermined rule further includes prioritizing CSI having a long period among the plurality of pieces of CSI for which at least any one of the time resource or the frequency resource is identical. 
 
     
     
       7. The terminal of  claim 5 ,
 wherein the predetermined rule further includes prioritizing CSI having a long period among the plurality of pieces of CSI for which at least any one of the time resource or the frequency resource is identical. 
 
     
     
       8. The terminal of  claim 5 ,
 wherein the predetermined rule is transmitted through higher layer signaling. 
 
     
     
       9. A method of reporting channel state information (CSI) based on a priority in a wireless communication system, the method performed by a base station comprising:
 transmitting, to a terminal, downlink control information (DCI) including a reporting trigger for some of a plurality of pieces of CSI using periodic reporting, 
 wherein the some of the plurality of pieces of CSI is semi-persistent CSI (SP-CSI) and remaining of the plurality of pieces of CSI other than the some of the plurality of pieces of CSI is periodic-CSI (P-CSI); and 
 receiving, from the terminal, reporting for specific CSI among the plurality of pieces of CSI, 
 wherein the specific CSI is CSI prioritized based on the predetermined rule among the plurality of pieces of CSI, and 
 wherein the predetermined rule includes prioritizing the SP-CSI over the P-CSI when the plurality of pieces of CSI for which at least any one of the time resource or the frequency resource is identical and has a period difference within a threshold or preset range.